Nelson Eddy

~ as ~

Prince Peter Karagin, aka Peter Teranda

Ilona Massey

~ as ~

Lydia Marakova

Charles Ruggles

~ as ~

Nicki Popoff

Frank Morgan

~ as ~

Ivan Danchenoff

Lionel Atwill

~ as ~

Professor Marakov

C. Aubrey Smith

~ as ~

General Karagin

Joyce Compton

~ as ~

Masha

Dalies Frantz

~ as ~

Dimitri Marakov

Phillip Terry

~ as ~

Lieutenant Smirnoff

Walter Woolf King

~ as ~

Michael Sibirsky